Statement: flowing into the Bay of Bengal: Brahmaputra, Kaveri, <MASK> (with its main tributaries Ramganga, Kali or Sharda, Gomti, Yamuna, Chambal, Betwa, Ken, Tons, Ghaghara, Gandaki, Burhi Gandak, Koshi, Mahananda, Tamsa, Son, Bagmati), Meghna, Mahanadi, Godavari, Krishna (and their main tributaries)

 Option A: Amravati

 Option B: Ganga

 Option C: Mahanadi

 Option D: Tons